Architecture

Preparation tips can be really long and how well you can follow the documented tips will vary from person to person so I will suggest you start with the basics and a mock test of SAT and TOEFL to understand your areas of weakness and strengths. Research firstly on TOEFL and SAT score requirements of various universities. Experts say that the SAT is more in favour of verbally inclined students, so read a lot , learn new words.However this does not indicate the math section is easy so learn short cuts and tricks. Practice is the key. Read textbooks, encyclopaedias, journals and research articles for both TOEFL or SAT. Here are two blogs which will give you an overall way to handle the stress and succeed in the tests
https://www.englishclub.com/esl-exams/ets-toefl-tips.htm
https://www.usnews.com/education/best-colleges/test-prep/articles/2010/05/21/test-prep-9-tips-for-sat-success
All the best

Scope for higher studies after B.Arch:
Many higher study options are there for the B.Arch graduates. These graduates can apply for CEED, which is the qualifying exam for higher study in design, during the final year itself. This also provides scholarship. Another option is the Master's degree in architecture. The graduates who have completed their B.Arch can join for this. The best option for higher study after B.Arch is the Master of design. It has many career opportunities. There are many institutes in India which offers this course. The admission to this course is based on the CEED score, design aptitude score and interview. Some of the higher study options after B.Arch are:
Postgraduate Diploma Programme in Design (PGDPD)
Master of Technology in Urban and Regional Planning (M.Tech. - URP)
Master of Technology in Housing (M.Tech. - HSG)
Master of Technology in Environmental Planning (M.Tech EP)
Master of Technology in Infrastructure Planning (M.Tech IP)
Master of Technology in Construction of Project Management (M.Tech - CPM)
Career opportunities after B.Arch:
The career opportunities for these graduates are high at present. These graduates can work as independent professionals or can take up jobs in Government or private sectors. Teaching in this field is also another option for the pleasant career. Anyone who had successfully completed B.Arch can register with COA. This can be done through agencies like CPWD. UPSC organizes examinations for these registered candidates to recruit them in various departments.
The pay packages for these professionals are increasing due to the demand for them in the construction and designing fields. The remuneration given for the skilled professionals in private sector is higher compared to others. An experienced professional can earn up to Rs.2 lakh to Rs.5 lakh per annum and the fresher can earn from Rs.1 lakh to Rs.1.5 lakh per annum.